The Extech AN320 is a professional-grade vane thermo-anemometer designed for precise air velocity and airflow measurements in demanding industrial and HVAC applications. With its 4-inch (10 cm) vane, it ensures accurate readings even in larger ducts, while its built-in thermistor provides reliable air temperature data. This multi-function instrument also measures relative humidity, wet bulb, dew point, and carbon dioxide (CO2) levels, making it an essential tool for comprehensive environmental monitoring.
Key Features & Highlights
- 4-inch (10 cm) vane for precise air velocity and airflow readings in larger ducts
- Measures air velocity, airflow, relative humidity, wet bulb, dew point, and CO2 for a complete environmental assessment
- Built-in thermistor for accurate air temperature measurement
- Multipoint and timed average calculations for enhanced data analysis
- Min/Max, Data Hold, and auto power off for convenient operation
- Complete kit includes four AAA batteries and a hard carrying case
Applications
The Extech AN320 is ideal for HVAC professionals, facility managers, and environmental engineers who need to verify airflow, monitor indoor air quality, and ensure proper ventilation in commercial and industrial settings. Its versatility makes it suitable for duct balancing, cleanroom validation, and compliance testing.





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